Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09843c57fd1db4d659dbab5ac519f8a735ccdda04ee1390f3e410d4d904fa4c7' 
  AND token = 'QUJeA1bHJt/fs690vnnXyOH8qrya9xg39+AqXxB/XMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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