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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '662e9415161406a4afe0e17b7815f374430c4be3edb81faf01daf38ba2e0a23b' 
  AND token = '0t+otqYClRyMADbv16vcYMWwFz6350l5Ydghro5MvZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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