Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11b44a8611cf33f352f0ff3055cbaa32005d013db1a574ac0abf73dff4aa4434' 
  AND token = 'B6e8dCbum5tN5oD01oDY4JFTdwdwEWe9+LfsozYAB0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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