Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab263474600a8802931c86961345e51c39555fbb0074108a86ea175ddfdd6b1c' 
  AND token = 'Z4DmstvsGNavPpNOkiGWybdsWaLq5StGY95qdXLO2bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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