Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfef052c18e879a0ddbc58333f727a5a2bf7483e47854cbf2de0ce23669d452e' 
  AND token = '7xNh9o+Ts9r9mLful3D6FfLH8oY1PIaqcqJZBfkRxBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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