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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0faef18dba66e0247769068fa58a6585be0df4fddf6801824574281fd622bdda' 
  AND token = '7A++SKCKRQv0qGCqrhBowbrFrHtA70S7H1mMXrKeV/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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