Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b31d93ac25d518582540da22c8a33dd14b60d12b878341f5376b3424955ffa22' 
  AND token = 'ssVN9GUTlk16dtTKR56aBDvCH1Qu8QK+wYFHGvabeEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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