Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b8064a4d4a6d8c054e56b19e7bf88833df7a9882a70e214163f8a120c3286fd' 
  AND token = 'm09YU546Xib3lzMDkiMjkjZXe913CofduNJdX9MP+yQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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