Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b2f0945b62aee025624f2df9bad3e8f662c82301890efa186d5982bb2b1b8a1' 
  AND token = 'QDXjl0KegHDuNVqSzgANqRkkeB2XhDY6ti8+zldlou8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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