SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c262e351c96905a3cc435587d91cc742be57db86627776656f8b0d4c59af328' 
  AND token = 'Jl/IUR2IGrlGhfeTiun59cFYeXXIBmS+4/nzCYRjsto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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