Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db038ac52ac5aea98ea2471e83af131b9e4f54ac2e0fd09fdb335a1ee5fe693d' 
  AND token = 'U7xRsYKvIwliMgCOybqLEVLRLrnruP7OWVQxa5bXmWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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