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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6a2e0b2086a5c00b37b2e412ae9d21568dfd208122a960495c814c864f37b58' 
  AND token = 'E8GUuArw66oxsX0chFDvH6MuWy2yaV6J+3TCSb2WjY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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