Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da1b103db0abeb3ce493d41294f10b4490e5a7f784a83486dd4820d7cf180544' 
  AND token = 'XBIa/nsJMQYSfePsjHIvxqy+ELJ0G/9JaSx6zKXpWF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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