SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fb62ef74b8f15e2a7990dc6e52bf465175a058437688196acd3074740bac41a' 
  AND token = 'a5hz2nFFPnS5/q+mAZQCaKHsyIkrq5iJ5iBrhQvr6+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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