Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f821acf70f4e0069049a387bb44d07b4611a045931653ad565dba7a9c5ac019f' 
  AND token = '5ag23n0asn/x1mJ9u26gNbfxHalpRamdo8LveDNZAC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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