Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9eb96e876892edf4616951120b92341ba16548ad46d39c5a86831d281ff33399' 
  AND token = 'B4Kr17pR5GIaG2zSAdkAYNMM+4e25A5Yz9os2YeS61g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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