Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82f442a1e9590d78d70fec4589f8e0738f7778935b9d613dedf85385f490bae2' 
  AND token = 'yqDHgi8PEqLn92EF9JuSn1633zSuxlCtroaLesBSSNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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