Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3257ae6c19832d887d5224953c7a85d15acf2525a648a25b5f4b6bb88792518' 
  AND token = 'xUx7DeQf0TQ3OGdQs/NFM+drx7tBBso9Gxi6Zr7TcKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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