Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5059550a0684804a42c6f577982e088f2e28dfc08d13a438f45f9a0adaba5a0c' 
  AND token = 'N2sjwLEm2dCnOcMw3548AGIwWBHXL+HiFN5ywr2UxO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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