Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4098e32940650364de5ee838c6cfa9ccf9ab2e0e851337609a983477e4efa63' 
  AND token = '1X2uDeJJkN72tfX537zDty/UB58RW+LzxBl0QgWiOtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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