Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2edf42c83e9aaeda11aed7a9a4968dbd3dc9d0aa356d7099e62c094afeef6ee6' 
  AND token = 'YSngbnP/II2/VFiLcjsZQEOTj09VA8zsWTQ6MSzW1RU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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