Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e61d11f2ad871bef654108e966b3a083e9ad3464274a6006580a33a08d8ee0' 
  AND token = '18e7FaqC50cjN3oiG66hxRNk9yrB5vPbUzCh1iEX1iE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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