SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab0543c291f776655de8232b42a6568c0ad3c1eb4586124ebd0e0f95ad44ce8c' 
  AND token = 'OjXOhFj+l88SKUn7WBRRoHIhyhtTyoCFq/Ivgk/kUxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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