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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd863060d4db78630de1a40cbdb1a8b473f303f23fcdeb301a5097d3d3bae77ff' 
  AND token = 'goc9KjmZoQky6fr80OPtmacNM+RfevKIskU/2i5Ay/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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