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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c32dd011f1aada883d22183120976d173fff48f5f6c4626f9ff5395484150a88' 
  AND token = 'QA8Uef0pof7rQxfBVc3eOjvYHkNgn1Q3IZXsDF0YtA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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