SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4adbcfd7cb2bbfc9a68bb995ff072a5a539f4f2e6baaa58832a28e3ecf0ae15' 
  AND token = 'qvoY6uGlv8GXBN5LtSNEZK/HVQ4/3JcSJbpDaXqV1AY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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