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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '905da7bb17969138de15557a28f1732c294ad2b26ebf65390fb3fc4021a5d82c' 
  AND token = 'NI7iLS1GcW2G3UHphEjnAUELxdIpBqDk2TjZ77ALbCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00106

JSON explain

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