Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddbc17e0ef8a3b43b486c687c68643e706b8f62f68f0a87fdd0f2b4216b0206a' 
  AND token = '3fi7kTJLUSyoQFhpxMJD9oEiRMDwo3Q1lx58jtzV/DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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