Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c8b0b596a73e6bf005e0a6bf2a730f5b7f8b64f9085044017193fff0a95023a' 
  AND token = 'xZIUIeg3Xw6a2hO97R0vXtZQZRM3L/kEMv+mzO8eJnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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