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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07007aeb0beae43806820665459ca2e0bab713dd4ab2af74f82a3bed4bebb246' 
  AND token = '+eDCM73WMSddjhu/yRNZhc8Tg9dtycf94vo0j68NcfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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