Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6b71f6357655e360f25be7c3fc838a2d9d769a0ab99c0060f091f0ed27f2061' 
  AND token = 'blRyWg6gwQ22zFPLmKA9p8ke2A2yie4A08DtUU2gMu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00200

JSON explain

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