Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0f2e40b11120c8da6e717105cb6be2752f5351a0b693884cdd4ff606207ae02' 
  AND token = 'KBi2lZzS4gSTDCbZagGkgaN7HVoeBE8DIQAA7bu1mRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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