Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82efe9a301cec04867708119d4448da39a3ef0fcbb3fe078aa6b05a32a4c3a98' 
  AND token = 'eg2PRfkMX/i0X/ZPYRABaBYFq57mHw+6II/VQW9mPpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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