Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d0224ba3bf9a036c98a65824b81850d0c4d372966b0b4d413bcd120a042a3c8' 
  AND token = 'jVLOuNL8F0ty52pLnOeuaS4itkgY6c2TmV49wmD4Grk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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