Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cc9b7ec59b1f890865cea8904f36be10fd631a67e0f670c27c652dd9a1da9ce' 
  AND token = 'Q9Le/rbnsOXEO6sITJbV/JYeHmGNjGTE0wiby74EScg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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