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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ffa19be07aaf02cdca96f8b576d13e029aa1e861b279f3883bf2ec8f20e2624' 
  AND token = 'zEAw6if/9SKP3FiJ/ErvrlvpJF2k48m5d0i3O5NdNOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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