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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd44d07b2106e67b4fe1cd5f67371cec241bd8cd48ed470d5c02ba023d5c970e6' 
  AND token = 'r00n9Nh32kfDuoHojmJ1go6fAUdptlvrtybdxzT+MiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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