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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df23bab40ffe2d09e85b12267496672ba5f9fb023dc241725b9c4eff96fcbfd7' 
  AND token = 'cVhHKbL5KJN+E4QwyHcgnIe+529eo0UolrPpagResjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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