Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6c027b78272b3fb7bd7c1488344101ea3bb48b550b33b24b8b0cb7cb9103cac' 
  AND token = '8FrsB5AWGk0veYpjZOAEThx/5Lzp0b53XOlQMi03Z/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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