Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9356b949aa0c8905afc48b2651781ffebe0950259802620c55a886b2c21c9a24' 
  AND token = '/hSs00jDSIwzWl0MOve7jPP6AG9xOW6VWHKocsbHaBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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