Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62971993dc7f4312e0ae9352c7aac76e5accd1c1a8b9e06e492e1b8c508b8d0e' 
  AND token = 'rguXfMLXMLItZvbNkqTxCsBrv7hTK4a3nhVKK6+XqXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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