SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '702abeb84efc9d841940ac9775129377e8429eb914c71ed402c08d933f66f828' 
  AND token = 'DvhoIVK9P8FXNrygZUBsXO/SZ+LGep1s+Y7mMd8iCUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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