Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4a1f482acb9c10ec32b033dcd960893f0f2cda8b6a5dd4a8c4067fc3e11af4b' 
  AND token = 'SVnJ+nwK0gklq48SAAIC63G8InkPx9OWhLLK5B2o2qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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