SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0180a80f66c1544b41f04aa7f59ae2456ebe61b23e379cde43c82e673db82f9b' 
  AND token = 'iljgRpXDC9qNZFdH4T+b2jsDOKz0FrncGbfJDyYFINg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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