Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20f4c06595d6cca822b392a3cf93ddd563789ff76ed34448fd497d14df36f442' 
  AND token = '4KNJDYGyPImWEJ21Oci6vKL2ilBt75vbcIwsc6QIDGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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