Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00b82882c50cd05064811115f56c53653d50ca6df4c8dde0a9707391796ae3b2' 
  AND token = 'v7lMy7iJMMe/i5B7ec/iKePfq/NiWqWkIoDJxASjrf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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