Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0c2d45e43da041d38acc9aa68512ba2469f36a535e3dc301161996f787ebc79' 
  AND token = 'm4gNnxBobwgk7JGhjIycz/bXI2NLrGfL5Xxcj9PjBo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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