SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '470597026809fc71bf10e920805f4a177a324f146cc319d2f3b91f2d960d72c4' 
  AND token = 'ARM85gj1A7ngD+bCrGVnGtVLmRc42fJfmFKIuXSE6hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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