Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b1a1dcd7b2dd526544fe013899c2a962d61c36014582f1d9f63c622b603775d' 
  AND token = 'Rp0M0OkEZGbcYVMadsU30+Bb89Q4Hugo4Rqt0ylbtJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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