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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11f4283c681226272cfafd0676022f3bb92cd3cf900a5ed0a57b17ca7402d682' 
  AND token = 'ud143Qa5jVFugt1fkl7Hbb8IDNP/s4vxpRNdGPlpJAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}