Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec25255fe67a0080492646f58be10d02346ec019c2315266e832f2711073869e' 
  AND token = 'ROwkdm+htCTwMfCfywKFORfQgUZWciy5nx4OSl6Jcbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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