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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad0a206ea6bdc0d8e9a8a2ab0e18b190ab1c715a2c3f719097e7c176964adc35' 
  AND token = 'Cf0NOm4KVKt2MjStGZYZsyDvarzbONQVHSjQX5MM+9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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