Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd42ad476e28447e95f23bcb67bead4e76f29565a83a8fba2d3d5ebfba2be4e47' 
  AND token = '1nsC5I/6lvl6/tsYP8Z4eflACkLDRMymyNU8rBRPiTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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