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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62c0d21ca95cef20c2b9c6d6c519850a0011cc70ebee694353cde906b7bdfa5d' 
  AND token = 'WJI+7KscW0RtxTwUhYwylWvfVJP86Ui5ImV4WlPFZ8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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