Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b25567b17a5d0b95f8abdf8eaf9c5ec9cf13b4abb532b8ce41cad4bd1014521' 
  AND token = 'G02tihsWqfTv+nn2fTNw37Rt8WskJJUct4G6V5C2DPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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