Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b341a3f682f304e65688628dd4af5406ae0a1b6c75557251bc5796077faf210' 
  AND token = 'CTWW8vFBiTlXJ09Fv2LA5Hlf1q9BdSCAQSvV9iop4ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}