Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2fef4bd6e5a1e39516f34d70988145611254ce7c193a86e2564eadf9864008f' 
  AND token = 'ewLmcR6p8tG6PmPA6EaSeUGz1uvfSkIRyNmcKAgGilo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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