SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfbd8a968518a811abfd676a838c623434314e9ebd18af0977ffb3bba48fee97' 
  AND token = 'lR0ghy2Dlkujqw3Fvf/qC9f+VmbSJBgpg5HW1GmvOu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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