Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f180159e13580b00bead2ac8c1f0fbadcb93eb1d6f4ac683d8a806985ca8e77e' 
  AND token = 'RyTnXNsnbdQq8OvIYcwIcuBpycxkK/0yVGwRC1KzW2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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