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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa8d5d6e55030cfaabe77345994f329180b9566205b54986cfa4ddc04bc0a1d' 
  AND token = 'GF2AEuafnlOnlZcMbIERK2g5AJcUV+zCS2cSLOeJSR8=' 
  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"
    }
  }
}