Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc99b0486c5ec38a670fffc6e838168896a88ac80ae4df603ceda16a0618ec7a' 
  AND token = '+8LCdsY4VGzSAGzNeGD+iNEN/3qd7DNfvF+/BimeF5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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