Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc26bebab5cb2c207f9f69197d307d393068bfb7aa63fdb77e35a01730844318' 
  AND token = '0Rh+NQgwxdQtN7g3PSgo2XYllIjjqRI9pjWTDIjdRAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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