Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5747bc29a1e9df97e6f81d1ef364c4fd2c7b2bd5f9efdf7997a71727030a526' 
  AND token = 'kX8KNKHWA3oJORMxr2aXXnOYvnhkFTW9NMP37yN0mt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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