Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '534bcc731653990cc78f99733465632e0a3a3dceac95a43ce70feade3266f706' 
  AND token = 'fiFXijl/vQPH5edlbLVcJv/PgveuACIFrJ/pUPynUVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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