Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75a0190035ea0664c172df9acfbed68bf6dc14dbae5d0be960d77f8ec729e9fd' 
  AND token = 'Bqa1hJT4qgLBJNQ6mU2ZcDd0BV76aZroc4w+tAq53mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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