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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f932666930b9b524542ad80e9c01b98ba367beeb095647abe0c4e721bdf7310b' 
  AND token = '0lscD61YdYExAYqqmZGe9z6/Wg+47y5W5Rtqy59DXsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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