Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd47b37870eb486657c82fcb6b74dd082b30e752ecf4d056e4105030be1de15a3' 
  AND token = 'fljX2Dh0J900h9rBSzF0RIW4Bu8+0tXL4VVmh9gXhSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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