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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd97e8f2d475ad79d204bc44db37e5c0bdf1db863876a9fdb86e0f1d8850dedd0' 
  AND token = 'bWih1U0/5YJ2mvIWvF9VlPxsCcvyN04xauA2fPI612Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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