Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2b43da495ec8fb624bd687b07acfafa8095b11c12e571022cd3fda1338bc752' 
  AND token = '01xHV6UMtf0gZ5oA2sCWS03sli6jdtYpyzxIAXWn3Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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