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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db2448abcdfd5e42837f528f7c57f2783176a90239a5437e335fec696b3c625f' 
  AND token = 'h2hkmC2EWP6eoKcu7xdgY2UH9pq6JJDZBxAk2FddYXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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