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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0afc244a9ce545f598cd53abb2503c477e2c204905d6d57f7b809f83a6e35b91' 
  AND token = 'sK8neN97HqXmvaqLcyv6bZy9t1DrIaw2Gkfk6wzHw6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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