Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03eccf10804495acc50446fc63d2a7bef453fcc12375c00f5c45cfe04a27b20f' 
  AND token = 'u+WHveExAMhAA42ZWzB9QnCOob0AATiLUzxk1ivsZ9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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