Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '959aaf25df1e1745768f5b0864936b6287447fe53d98fbfcf3ee9d3f4ea32bec' 
  AND token = 'IXfXqxa+in0BZKi6SN/hzcGzNaPaPni1yEVzW4udL9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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