Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e217a8f36120df3e1984a744865c411bad9c8a799ae7eb797be6dce4508bf54' 
  AND token = 'Fv3PO4NiCgFI78TMA+q2co721uxZRFCtNOxSod2XAP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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