Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '374fce920664f701d4ced9251d2f060e7449f3963523f7a66572faaf76029264' 
  AND token = 'Ji6zjcIfFKJrCPPcf9mQ8Y3jbijjdInPyqOiYjkHWB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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