SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48943fb13c53e408791bd9a939b86b6bc7de4970e7302a39cd25b34bc1d10846' 
  AND token = 'UOVhz7F8RsjJnF2D0/Dgq+oxbZppc+hXHDcDcXXtwOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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