Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d795da354c03c453cda2a400279e0f743aaa22bcbb19898e9ac4d5282317448' 
  AND token = 'KQ+/L+MiPpy1i8t6KHmETFzysbXwwbJx7viYZnfZTso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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