Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b07d3ea103e7607d65d8e3ab2219115c05533d0ad1732f6c0151fce9b6a1057' 
  AND token = '6LSnPl8DF8oW1wmA+5ZHWYeR92JlXL7jo3k81q9z70M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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